Last deglacial abrupt climate changes caused by meltwater pulses in the Labrador Sea
Freshwater perturbations are often thought to be associated with abrupt climate changes during the last deglaciation, while many uncertainties remain regarding the exact timing, pathway, mechanism, and influence of meltwater release. Here, we present very well-dated and high-resolution records from...
Published in: | Communications Earth & Environment |
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Springer Science and Business Media LLC
2023
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Online Access: | https://archimer.ifremer.fr/doc/00828/94007/100852.pdf https://archimer.ifremer.fr/doc/00828/94007/100853.pdf https://archimer.ifremer.fr/doc/00828/94007/100854.pdf https://doi.org/10.1038/s43247-023-00743-3 https://archimer.ifremer.fr/doc/00828/94007/ |
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ftarchimer:oai:archimer.ifremer.fr:94007 2023-12-24T10:17:12+01:00 Last deglacial abrupt climate changes caused by meltwater pulses in the Labrador Sea You, Defang Stein, Ruediger Fahl, Kirsten Williams, Maricel C. Schmidt, Daniela N. Mccave, Ian Nicholas Barker, Stephen Schefuß, Enno Niu, Lu Kuhn, Gerhard Niessen, Frank 2023-03 application/pdf https://archimer.ifremer.fr/doc/00828/94007/100852.pdf https://archimer.ifremer.fr/doc/00828/94007/100853.pdf https://archimer.ifremer.fr/doc/00828/94007/100854.pdf https://doi.org/10.1038/s43247-023-00743-3 https://archimer.ifremer.fr/doc/00828/94007/ eng eng Springer Science and Business Media LLC https://archimer.ifremer.fr/doc/00828/94007/100852.pdf https://archimer.ifremer.fr/doc/00828/94007/100853.pdf https://archimer.ifremer.fr/doc/00828/94007/100854.pdf doi:10.1038/s43247-023-00743-3 https://archimer.ifremer.fr/doc/00828/94007/ info:eu-repo/semantics/openAccess restricted use Communications Earth & Environment (2662-4435) (Springer Science and Business Media LLC), 2023-03 , Vol. 4 , N. 1 , P. 81 (12p.) text Article info:eu-repo/semantics/article 2023 ftarchimer https://doi.org/10.1038/s43247-023-00743-3 2023-11-28T23:51:10Z Freshwater perturbations are often thought to be associated with abrupt climate changes during the last deglaciation, while many uncertainties remain regarding the exact timing, pathway, mechanism, and influence of meltwater release. Here, we present very well-dated and high-resolution records from the eastern Labrador Sea representing the last 19.000 years, which demonstrate abrupt changes in sea surface characteristics. Four millennial-scale meltwater events have been identified between the last 14.000 and 8.200 years based on independent biomarker proxies and X-ray fluorescence scanning data. These events are characterized by increased sea ice formation and decreased sea surface temperatures which might have occurred within a few decades. We propose these abrupt changes were triggered by meltwater pulsing into the Labrador Sea periodically, resulting from collapse of the Laurentide-Greenland Ice Sheets caused by (sub-)surface ocean warming in the Labrador Sea. Our findings provide more precise information about impact of freshwater forcing on abrupt climate changes, which may help to improve simulations for past and future changes in ocean circulation and climate. Article in Journal/Newspaper Greenland Labrador Sea Sea ice Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) Greenland Communications Earth & Environment 4 1 |
institution |
Open Polar |
collection |
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) |
op_collection_id |
ftarchimer |
language |
English |
description |
Freshwater perturbations are often thought to be associated with abrupt climate changes during the last deglaciation, while many uncertainties remain regarding the exact timing, pathway, mechanism, and influence of meltwater release. Here, we present very well-dated and high-resolution records from the eastern Labrador Sea representing the last 19.000 years, which demonstrate abrupt changes in sea surface characteristics. Four millennial-scale meltwater events have been identified between the last 14.000 and 8.200 years based on independent biomarker proxies and X-ray fluorescence scanning data. These events are characterized by increased sea ice formation and decreased sea surface temperatures which might have occurred within a few decades. We propose these abrupt changes were triggered by meltwater pulsing into the Labrador Sea periodically, resulting from collapse of the Laurentide-Greenland Ice Sheets caused by (sub-)surface ocean warming in the Labrador Sea. Our findings provide more precise information about impact of freshwater forcing on abrupt climate changes, which may help to improve simulations for past and future changes in ocean circulation and climate. |
format |
Article in Journal/Newspaper |
author |
You, Defang Stein, Ruediger Fahl, Kirsten Williams, Maricel C. Schmidt, Daniela N. Mccave, Ian Nicholas Barker, Stephen Schefuß, Enno Niu, Lu Kuhn, Gerhard Niessen, Frank |
spellingShingle |
You, Defang Stein, Ruediger Fahl, Kirsten Williams, Maricel C. Schmidt, Daniela N. Mccave, Ian Nicholas Barker, Stephen Schefuß, Enno Niu, Lu Kuhn, Gerhard Niessen, Frank Last deglacial abrupt climate changes caused by meltwater pulses in the Labrador Sea |
author_facet |
You, Defang Stein, Ruediger Fahl, Kirsten Williams, Maricel C. Schmidt, Daniela N. Mccave, Ian Nicholas Barker, Stephen Schefuß, Enno Niu, Lu Kuhn, Gerhard Niessen, Frank |
author_sort |
You, Defang |
title |
Last deglacial abrupt climate changes caused by meltwater pulses in the Labrador Sea |
title_short |
Last deglacial abrupt climate changes caused by meltwater pulses in the Labrador Sea |
title_full |
Last deglacial abrupt climate changes caused by meltwater pulses in the Labrador Sea |
title_fullStr |
Last deglacial abrupt climate changes caused by meltwater pulses in the Labrador Sea |
title_full_unstemmed |
Last deglacial abrupt climate changes caused by meltwater pulses in the Labrador Sea |
title_sort |
last deglacial abrupt climate changes caused by meltwater pulses in the labrador sea |
publisher |
Springer Science and Business Media LLC |
publishDate |
2023 |
url |
https://archimer.ifremer.fr/doc/00828/94007/100852.pdf https://archimer.ifremer.fr/doc/00828/94007/100853.pdf https://archimer.ifremer.fr/doc/00828/94007/100854.pdf https://doi.org/10.1038/s43247-023-00743-3 https://archimer.ifremer.fr/doc/00828/94007/ |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Labrador Sea Sea ice |
genre_facet |
Greenland Labrador Sea Sea ice |
op_source |
Communications Earth & Environment (2662-4435) (Springer Science and Business Media LLC), 2023-03 , Vol. 4 , N. 1 , P. 81 (12p.) |
op_relation |
https://archimer.ifremer.fr/doc/00828/94007/100852.pdf https://archimer.ifremer.fr/doc/00828/94007/100853.pdf https://archimer.ifremer.fr/doc/00828/94007/100854.pdf doi:10.1038/s43247-023-00743-3 https://archimer.ifremer.fr/doc/00828/94007/ |
op_rights |
info:eu-repo/semantics/openAccess restricted use |
op_doi |
https://doi.org/10.1038/s43247-023-00743-3 |
container_title |
Communications Earth & Environment |
container_volume |
4 |
container_issue |
1 |
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1786205158058754048 |